21249904

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{283}}^1$

素因数の和:342

約数の個数: 60

約数和(自身を含む): 46960536

約数和(自身を除く): 25710632

約数列:

[1, 2, 4, 8, 13, 16, 19, 26, 38, 52, 76, 104, 152, 208, 247, 283, 304, 361, 494, 566, 722, 988, 1132, 1444, 1976, 2264, 2888, 3679, 3952, 4528, 4693, 5377, 5776, 7358, 9386, 10754, 14716, 18772, 21508, 29432, 37544, 43016, 58864, 69901, 75088, 86032, 102163, 139802, 204326, 279604, 408652, 559208, 817304, 1118416, 1328119, 1634608, 2656238, 5312476, 10624952, 21249904]

約数ペア:

[(1, 21249904), (2, 10624952), (4, 5312476), (8, 2656238), (13, 1634608), (16, 1328119), (19, 1118416), (26, 817304), (38, 559208), (52, 408652), (76, 279604), (104, 204326), (152, 139802), (208, 102163), (247, 86032), (283, 75088), (304, 69901), (361, 58864), (494, 43016), (566, 37544), (722, 29432), (988, 21508), (1132, 18772), (1444, 14716), (1976, 10754), (2264, 9386), (2888, 7358), (3679, 5776), (3952, 5377), (4528, 4693)]